Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755174AbZCFNcR (ORCPT ); Fri, 6 Mar 2009 08:32:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753825AbZCFNau (ORCPT ); Fri, 6 Mar 2009 08:30:50 -0500 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:25149 "EHLO SG2EHSOBE001.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753951AbZCFNaq (ORCPT ); Fri, 6 Mar 2009 08:30:46 -0500 X-BigFish: VPS1(zzzzzzz32i66h) X-Spam-TCS-SCL: 5:0 X-WSS-ID: 0KG36UU-01-JKW-01 From: Joerg Roedel To: mingo@redhat.com CC: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Joerg Roedel Subject: [PATCH 01/18] dma-debug: add Kconfig entry Date: Fri, 6 Mar 2009 14:30:12 +0100 Message-ID: <1236346229-6618-2-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.6.4 In-Reply-To: <1236346229-6618-1-git-send-email-joerg.roedel@amd.com> References: <1236346229-6618-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 06 Mar 2009 13:30:30.0011 (UTC) FILETIME=[B7D60CB0:01C99E5F] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1582 Lines: 49 Impact: add a Kconfig entry for DMA-API debugging Signed-off-by: Joerg Roedel --- arch/Kconfig | 2 ++ lib/Kconfig.debug | 11 +++++++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 550dab2..830c16a 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -106,3 +106,5 @@ config HAVE_CLK The calls support software clock gating and thus are a key power management tool on many systems. +config HAVE_DMA_API_DEBUG + bool diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 1bcf9cd..d9cbada 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -902,6 +902,17 @@ config DYNAMIC_PRINTK_DEBUG debugging for all modules. This mode can be turned off via the above disable command. +config DMA_API_DEBUG + bool "Enable debugging of DMA-API usage" + depends on HAVE_DMA_API_DEBUG + help + Enable this option to debug the use of the DMA API by device drivers. + With this option you will be able to detect common bugs in device + drivers like double-freeing of DMA mappings or freeing mappings that + were never allocated. + This option causes a performance degredation. Use only if you want + to debug device drivers. If unsure, say N. + source "samples/Kconfig" source "lib/Kconfig.kgdb" -- 1.5.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/